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AA222 - Technical Specifications
Page 1
Technical Specifications
AA222
Audio Traveller
Item No. 8107028-1 – 07/2014
AA222 - Technical Specifications
Page 2
Included and Optional Parts
Parts
Included Parts:
Audiometric headphone Single contralateral headset
CIR33 Insert earphones
B71 Bone conductor
APS2 Patient Signal
ATP-AT235U Universal probe system with shoulder strap and wrist strap (tubing 360mm Ø1.3xØ3.3
transparent silicone)
TPR26 3 rolls of recording paper
Power cable
Dust cover
Operation Manual.
Multilingual CE instructions for use
Additional Parts:
EARtone 5A Audiometric Insert Phones
50250 Peltor noise exclosures
21925 Amplivox noise exclosures
ACC400 carrying case
CAT50 calibration unit 0.2-0.5-2.0-5.0 ml
IES impedance ear simulator
GSE10 RS232 Galbanic isolation adapter
USB cable 2m black
AA222 - Technical Specifications
Page 3
General Technical Specifications
Standards:
Safety:
EMC:
Impedance:
Audiometer:
IEC60601-1, Class 1, Type B
IEC60601-1-2
IEC60645-5/ANSI S3.39, Type 2
IEC60645-1/ANSI S3.6, Tone Type 2, Speech Type B-E
Power:
Consumption:
Mains voltage/fuses:
15VA
100-240V~, 50-60Hz, 0.5A max.
The AA222 is delivered with a power cord for the relevant national mains socket. But AA222 can be
powered by any national AC voltage - Before use, the correct attachment plug/mains cable must be
identified and installed.
Operation Environment:
Temperature:
Rel. Humidity:
15 – 35 C / 65 – 95 F
30 – 90%
Temperatures below 0C / 32F and above 50C / 122F may cause permanent damage to the
instrument and accessories.
Warm up time:
10min at room temperature (20C / 68F)
Printer (Optional)
Type:
Printing Time:
Thermal printer with recording paper in rolls.
Depending on the test printed.
Paper Rolls:
Width:
Diameter:
Basis weight:
Thickness:
Tensile:
112 (+/- 0.5) mm
45 (+2.0) mm
58.5 +/- 3g/m2
62 +/- 3 u
Min. 3.2 kN/m
AA222 - Technical Specifications
Page 4
Impedance Measuring System
Probe tone:
Frequency:
Level :
226 Hz.
85 dB SPL with AGC, assuring
constant level at different volumes.
Air Pressure
Control:
Indicator:
Range:
Pressure Limitations:
Pressure Change Rate:
Compliance
Range:
0.1 to 6.0 ml (Ear volume: 0.1 to 8.0 ml). No difference is
measured in the recorded values between static and dynamic
measuring mode.
Types
Tympanometry:
Automatic, where the start and stop pressure can be userprogrammed from the setup menu.
Eustachian Tube
Function:
Williams test (automatic function).
Indicators
Graphical display:
Compliance is indicated as ml and pressure as daPa. Stimulus
level is indicated as dB Hearing Level.
Memory
Tympanometry:
Eustachian Tube
Function:
1 curve per ear.
3 curves per ear.
Impedance calibration properties
Probe tone
Frequencies:
Level:
Distortion:
Calibrated transducers
Audiometry headset:
Bone conductor:
-8
226 Hz ± 1%, 678 Hz ± 1%, 800 ± 1%,
85 dB SPL ± 1.5 dB measured in an IEC 60318-5 acoustic
coupler. The level is constant for all volumes in the
measurement range.
Max 3% THD
Telephonics TDH/DD45 with a static force of 4.5N 0.5N
Radioear B71 with a static force of 5.4N0.5N
Definition of units
1 ml at 226 Hz = 1 acoustic mmho,
3
1 acoustics mho = 10 m /Pa·s
1 daPa = 10 Pascal
Automatic.
Measured value is displayed on the graphical display.
-600 to +300 daPa.
-800 daPa and +600 daPa.
Minimum (50 daPa/s), medium, maximum or automatic with
minimum speed at compliance peak. Selectable in the setup.
AA222 - Technical Specifications
Page 5
Reflex and Audiometer Functions
Signal Sources
Tone – Contra, Reflex:
Tone – Contra,
Audiometry:
Tone – Ipsi, Reflex:
Noise – Contra, Reflex:
Noise – Ipsi, Reflex:
Noise – Audiometry:
Inputs
CD1/2:
Mic:
Talk Back:
Patient Response:
Output
Audiometry Earphones:
Bone Conduction:
Free Field 1 and 2:
Monitor:
Contra Earphone:
Ipsi Earphone:
Reflex sensitivity:
Reflex detection:
Air:
USB:
Keyboard:
Tolerance
Probe tone:
Insert earphones:
Super-aural earphone:
250, 500, 1000, 2000, 3000, 4000, 6000 and 8000Hz.
125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000 and
8000Hz
500, 1000, 2000, 3000 and 4000Hz.
Wide Band, High Pass, Low Pass
Wide Band, High Pass, Low Pass.
Narrow Band (IEC60645-1) White Noise
Connection for CD player or tape recorder.
Connection for external microphone for live speech.
Connection for talk back microphone.
Patient response switch connection.
Audiometric headphone, left and right.
B71 bone conductor.
Electrical output for external 2 channel power amplifier (AP12
and AP70).
Monitor earphone disconnects the internal monitor loudspeaker
when inserted. Operator can monitor signal when presented to
the patient as well as the talk back signal from the patient’s
microphone.
Audiometric headphones for reflex and audiometry
measurements.
Probe earphone incorporated in probe system for reflex
measurements.
0.001 ml is the lowest detectable volume change.
The risk of artefacts at higher stimulus levels in reflex
measurements are minor and will not activate the reflex
detection system.
Connection for air system to probe.
Input/output for PC connection. An external PC can be setup to
both monitor and control the instrument.
The control actions can be followed on the display and the
operation panel. Online communication can be selected, where
the measured data will be sent to an external PC.
Connection for external keyboard, standard PC type.
frequency accuracy better than 2%
frequency accuracy better than 3%
frequency accuracy better than 3%
THD
Probe tone:
Insert earphones:
Super-aural earphone:
THD is less than 3%
THD is less than 5%
THD is less than 2.5%
AA222 - Technical Specifications
Attenuator
Range:
Test Types
Manual Audiometry:
Automatic Audiometry:
Manual Reflex:
Reflex Decay:
SISI:
Warble:
Stenger:
ABLB :
Page 6
0 to 130 dB in 1 or 5 dB steps.
Typical range is –10 to 120 dB HL.
Range is individual for different modes – see table 1.
Manual control of all functions.
Auto threshold according to ISO 8253-1 (Patient controlled
Hughson Westlake). Threshold is determined by the activation of
the patient response.
Manual control of all functions.
Manually controlled with stimulus duration of 10 seconds.
With automatic scoring calculation (5 dB included for
familiarisation.
5 Hz sine, +/-5 % modulation.
Binaural pure tone or speech stimulation.
Automatic loudness balance test (Fowler).
Memory
6 ipsilateral and 6 contralateral graphs / curves, which each can hold up to 6 pulses. There is an
additional capacity for 6 manual tests.
Properties of stimuli
General
Specifications for stimulus and audiometer signals are made to follow IEC 60645-1
Contralateral Earphone
Pure tone:
Wide Band noise (WB):
- spectral properties:
Low pass noise (LP):
- spectral properties:
Hign pass noise (HP):
Ipsilateral Earphone
Pure tone:
Wide Band noise (WB):
- spectral properties:
Low pass noise (LP):
- spectral properties:
Hign pass noise (HP):
General about levels:
Electrical output properties
Initial Latency:
Rise Time:
Terminal latency:
Fall time:
Overshoot:
Undershoot:
ISO 389-1 for audiometric headphone
Interacoustics standard
As “Broad band noise” specified in IEC 60645-5, but with 500 Hz
as lower cut-off frequency.
Interacoustics standard
Uniform from 500 Hz to 1600 Hz, ±5 dB re. 1000 Hz level
Uniform from 1600 Hz to 10 kHz, ±5 dB re. 1000 Hz level
Interacoustics standard
Interacoustics standard
As “Broad band noise” specified in IEC 60645-5, but with 500 Hz
as lower cut-off frequency.
Interacoustics standard
Uniform from 500 Hz to 1600 Hz, ±10 dB re. 1000 Hz level
Uniform from 1600 Hz to 10 kHz, ±10 dB re. 1000 Hz level
The actual sound pressure level at the eardrum will depend on
the volume of the ear. See table 2.
44.2 (+5/-0) mS
44.2 (+5/-0) mS
44.2 (+5/-0) mS
44.2 (+5/-0) mS
5 % (± 2%)
5 % (± 2%)
AA222 - Technical Specifications
Page 7
Table 1: Frequencies and intensity ranges
Frequency
Reflex
Contralateral
Audiometric
headphone
Ipsilateral
EAR-Tone 3A
Insert/CIR33
Hz
Min
dB HL
Max*
dB HL
Min
dB HL
Max*
dB HL
Min
dB HL
Max*
dB HL
Min
dB HL
Max*
DB HL
250
500
1000
2000
3000
4000
6000
8000
-10
-10
-10
-10
-10
-10
-10
-10
110
120
120
120
120
120
120
110
-10
-10
-10
-10
-10
-10
-10
-10
105
110
120
120
120
115
100
95
0
0
0
0
0
0
-
100
105
110
105
100
95
-
10
10
10
10
10
-
105
110
105
100
100
-
WB noise
LP noise
HP noise
-10
-10
-10
120
120
120
-10
-10
-10
120
120
120
0
0
0
100
100
100
10
10
10
105
105
105
Minimum level step size 5 dB
Maximum difference error between tow steps is less than ±3 dB
Residual noise is less than 25 dB (A)
Signal to noise ratio is larger than 80 dB (A)
ON-OFF ration is larger than 80 dB (A)
Rise-/fall time: 35 ms (±10 ms)
Table 2: Variation of ipsi stimulus levels for different volumes of the ear canal
Freq.
[Hz]
500
1000
2000
3000
4000
Variation of ipsi stimulus levels for different
volumes of the ear canal
Relative to the calibration performed on an IEC 126 coupler
0.5 ml
1 ml
[dB]
[dB]
9.7
5.3
9.7
5.3
11.7
3.9
-0.8
-0.5
-1.6
-0.8
WB
LP
7.5
8.0
3.2
3.6
HP
3.9
1.4
AA222 - Technical Specifications
Page 8
Table 3: General properties for earphones
Sound attenuation values for
earphones
Freq.
[Hz]
125
160
200
250
315
400
500
630
750
800
1000
1250
1500
1600
2000
2500
3000
3150
4000
5000
6000
6300
8000
Attenuation
Audiometric
headphone
with
MX41/AR or
PN 51
cushion
[dB]
3
4
5
5
5
6
7
9
11
15
18
21
26
28
31
32
29
26
24
EAR-Tone
3A
[dB]
32.5
36
37.5
36.5
33
39.5
42.5
Difference between free field
and coupler sensitivity
levels. Used by Free Field
equivalent earphone output
(Type A-E or B-E)
Freq.
Correction
values
Audiometric
headphone with
MX41/AR or
PN 51 cushion
using IEC 303
coupler
[Hz]
[dB]
125
160
200
250
315
400
500
630
750
800
1000
1250
1500
1600
2000
2500
3000
3150
4000
5000
6000
6300
8000
-17.5
-14.5
-12
-9.5
-6.5
-3.5
-0.5
0
-0.5
-0.5
-1
-4
-6
-7
-10.5
-10.5
-11
-10.5
1.5
AA222 - Technical Specifications
Page 9
Table 4: Reference values for stimulus and audiometer calibration
Freq.
Reference values for stimulus and audiometer
calibration
ISO
389-1
ANSI
S3.6
ISO 389-4 ISO 389-3
(ISO 8798)
(ISO
(NB
7566)
(TDH/ (TDH/DD masking)
(BC)
DD45)
45)
[Hz]
[dB [dB re. [dB re.
re.
20
20 µPa]
20
µPa]
µPa]
125
45, 45
0
25, 25,5
5
11, 11,5
5
7,5
8
7
7
6,5 6,5
9
9
10 10
9,5 9,5
15, 15,5
5
13 13
250
500
750
1000
1500
2000
3000
4000
6000
8000
WB
LP
HP
ANSI
S3.6
ISO 389-2
(Insert)
(BC)
[dB re. [dB re.
1µN]
1µN]
4
ISO 389- ISO 389- Interacoustics Standard
7
7
Free
Diffuse- TDH/DD Insert Ipsi
field
field
45
(FF)
(FF)
[dB re. [dB re. [dB re. [dB re. [dB [dB re.
20 µPa]
20
20
20
re.
20
µPa] µPa] µPa]
20 µPa]
µPa]
26
22,0 22,0
4
67
67
14
11,0 11,0
4
58
58
5,5
4,0
3,5
5
6
6
6
6
5
5
48,5
42,5
36,5
31
30
35,5
40
48,5
42,5
36,5
31
30
35,5
2
0
2
3
3,5
5,5
2
2,0
2,0
0,5
-1,5
-6,0
-6,5
2,5
1,0
0,5
-1,0
-1,5
-4,0
-5,0
-0,5
5
40
0
11,5
5,5
-8
-6
-10
-5
-7
-8
-5
-7
-8
ISO 389-3 / ANSI S3.6. Valid for placement on the human mastoid
Coupler types used by calibration
 TDH/DD45 is calibrated using a 6cc acoustic coupler made in accordance to IEC 60318-3
 Insert phones are calibrated using a 2cc acoustic coupler made in accordance to IEC 60318-5
 Bone Conductor is calibrated using a mechanical coupler made in accordance to IEC 60318-6
AA222 - Technical Specifications
Page 10
Tabe 5. Specification of input/output connections
Inputs
Connector
type
Mains connector IEC 60320-1
Type C6
Patient response Jack, 6.3mm
stereo
CD 1 and 2
Jack, 3.5mm
stereo
Electrical properties
2.5A/250V AC
Handheld switch:
Sensitivity:
Impedance:
Freq. Response:
Microphone
Jack, 3.5 mm Type:
stereo
Sensitivity:
Impedance:
Freq.Response:
Electret bias:
Talk Back
microphone
Jack, 6,3 mm As for Microphone
stereo
Signal is forced to +5V level when
activated.
9 mV at max volume and 0 Vu
47.5 k
75-12000 Hz  3dB
Electret or 2000 dynamic
microphone.
100 V at max volume for 0 Vu
reading
47.5 k
90-20kHz
6.2V through 4.75 k (1.3 mA)
Outputs:
Phones, Left/
Right
Jack, 6.3mm
mono
Voltage:
Min. load impedance:
Up to 5.5V rms. by 10 load
5
Bone conductor
Jack, 6.3mm
mono
Phono
As for Phones,
Left/Right
Voltage:
Min. load impedance:
Freq. response:
Output impedance:
Up to 8.0V rms. by 100 load
100
75-12000 Hz +/-3dB
500 ohm
Monitor
Jack, 6.3mm
mono
Voltage:
Min. load impedance:
Up to 2.0V rms. by 8 load
0
Phones,
Contralateral
(Insert masking)
Transducer
Jack, 6.3mm
mono
Voltage:
Min. load impedance:
Up to 5.5V rms. by 10 load
5
CANON, 15
pole
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Press. 1 signal
12V
-12V
Remote key/detection
Probe tone
Mic. signal
LED blue
Press. 2 signal
LED green
Ipsi Stim. Gnd.
Ipsi Stim. Signal
Probe tone Gnd.
Gnd.
Vref., 5V
LED red
USB type”B”
USB port for
communication
See appendix A in service manual
for detailed information
Free Field 1, 2
Data I/O:
USB
AA222 - Technical Specifications
Page 11
Table 6: General properties for earphones.
Sound attenuation values for earphones
Frequency
Attenuation
TDH/DD45 with MX41/
EAR-Tone 3A
AR or PN 51 cushion
EAR-Tone 5A
[Hz]
[dB]
[dB]
125
160
200
250
315
400
500
630
750
800
1000
1250
1500
1600
2000
2500
3000
3150
4000
5000
6000
6300
3
4
5
5
5
6
7
9
11
15
18
21
26
28
31
32
29
26
33,5
8000
24
43,5
34,5
34,5
35,0
33,0
39,5
Table 7: Audiometry frequencies and intensity ranges
Frequency
TDH/DD4
5
EAR-Tone
3A
Audiometry
Bone
Insert Masking
conduction
NB
B71
Min
Max
*
Min
Max*
Min
Max*
Min
Max*
Min
Max*
Hz
dB
HL
dB
HL
dB
HL
-10
--
-
dB
HL
-10
dB HL
90
dB
HL
-
dB HL
-10
dB
HL
-
dB HL
125
dB
HL
90
110
-10
105
0
45
0
105
-10
90
110
0
65
0
110
-10
100
250
-10
Free Field
80
500
-10
120
-10
750
-10
120
-10
115
0
70
0
110
-10
100
120
-10
120
0
70
0
110
-10
100
120
-10
120
0
70
0
110
-10
100
120
-10
120
0
75
0
110
-10
100
120
0
80
0
110
-10
100
1000
1500
2000
-10
-10
-10
3000
-10
120
-10
4000
-10
120
-10
115
0
80
0
105
-10
100
6000
-10
120
-10
100
0
55
0
95
-10
95
8000
-10
110
-10
95
0
50
0
90
-10
90
Speech
Speech
Noise
Type
B
-10
100
-10
90
-10
50
-
-
0
100
Type
B-E
-10
110
-10
90
-10
50
-
-
0
100
Type
B
-10
100
-10
90
-
-
0
90
0
90
Type
B-E
-10
110
-10
90
-
-
0
90
0
90
Note: Max values are obtainable by selecting “Ext. Range” on the instrument.